laird: ath6kl: Fix scheduling while atomic bug during firmware recovery

During firmware recovery, which is done in an interrupt context, some
atheros driver events are sent via netlink which use GFP_KERNEL.
Memory allocations using GFP_KERNEL allow for sleeping which is not
allowed in an interrupt.  Replacing those with GFP_ATOMIC which is safe.

Bug: 6950

drivers/net/wireless/ath/ath6kl/wmi.c

@@ -4522,7 +4522,7 @@ static void ath6kl_wmi_event_multicast(enum wmi_cmd_id cmd_id, u8 *datap, int le
 	void *hdr;
 
 	//allocate the memory
-    msg = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+    msg = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 	if (!msg) 
 		return;
 
@@ -4547,7 +4547,7 @@ static void ath6kl_wmi_event_multicast(enum wmi_cmd_id cmd_id, u8 *datap, int le
 	genlmsg_end(msg, hdr);
 
    	//send the message */
-	genlmsg_multicast(msg, 0, atheros_events_mcgrp.id, GFP_KERNEL);
+	genlmsg_multicast(msg, 0, atheros_events_mcgrp.id, GFP_ATOMIC);
 
 	return;
 
@@ -4561,15 +4561,15 @@ void ath6kl_drv_event_multicast(enum atheros_cmd_id cmd_id, unsigned int reason)
 	struct sk_buff *msg;
 	void *hdr;
 
-	msg = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	msg = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
 	if (msg)
 		hdr = genlmsg_put(msg, 0, 0, &atheros_fam, 0, cmd_id);
 	if (!hdr)
 		nlmsg_free(msg);
 	else {
 		nla_put_u32(msg, ATHEROS_ATTR_MSG, reason);
 		genlmsg_end(msg, hdr);
-		genlmsg_multicast(msg, 0, atheros_events_mcgrp.id, GFP_KERNEL);
+		genlmsg_multicast(msg, 0, atheros_events_mcgrp.id, GFP_ATOMIC);
 	}
 
 	return;